.my-btn {
  font-size: 36px;
  color: red;
  text-align: center;

  padding: 10px;
  border-radius: 10px;
}

.default {
  background-color: #cdcdcd;
}

.primary {
  background-color: green;
}

.my-btn-hover {
  opacity: 0.8;
}
